IQIS2009: Italian Quantum Information Science Conference 2009
timetable:
Fri 6 Nov, 10:00 - 10:30, Aula Dini
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Trace-Norm Isometries in Quantum Information Encoding and Protection
speaker: Francesco Ticozzi (Università di Padova)abstract: We illustrate how the problems of faithful encoding and correction of quantum information in physical systems can be investigated by embracing the operational notion of "distinguishability preservation". A measure of distinguishability of quantum states is given by the trace-norm distance. In fact, by using trace-norm isometries, we derive a "subsystem principle" for quantum information encoding, as well as necessary and sufficient conditions for error correction. A robustness analysis of the same issuess can also be developed by considering approximate isometries. Work in collaboration with L. Viola (Dartmouth College).
timetable:
Fri 6 Nov, 10:00 - 10:30, Aula Dini
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